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Direct Blue 132

Name:C.I.Direct Blue 132,C.I.27725

Molecular Structure: Double azo class

C.I.Direct Blue 132,C.I.27725,CAS 8005-87-6,686.63,C30H20N6Na2O7S2,Diamingen B extra

C.I.Direct Blue 132,C.I.27725,CAS 8005-87-6,686.63,C30H20N6Na2O7S2,Diamingen B extra

Molecular Formula:C30H20N6Na2O7S2

Molecular Weight: 686.63

CAS Registry Number:8005-87-6

Manufacturing Methods :5-Acetamido-8-amino-2-naphthalenesulfonic acid  diazo, and Naphthalen-1-amine coupling, product to diazo, in alkaline conditions and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid  coupling, and then hydrolysis acetyl amino.

Properties and Applications: green light navy blue. Soluble in water for blue, slightly soluble in ethanol and soluble fiber element. The strong sulfuric acid in the green light for black, dark blue purple for diluted; In the nitric acid for brown; In strong hydrochloric acid slightly soluble in for black. The dye solution to join strong hydrochloric acid have red light blue precipitation; Add sodium hydroxide have red light purple precipitation.

Standard Acid Resistance Alkali Resistance Light Fastness Soaping Water
Fading Stain Fading Stain
ISO 5 4-5 3-4 4 4
AATCC 4 4-5 3-4 4 4-5

List of Suppliers:

Diamingen B extra( Carbotex Consultants )


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